WO2020200396A1 - Appareil de compensation de décalage doppler, procédé correspondant et programme informatique - Google Patents

Appareil de compensation de décalage doppler, procédé correspondant et programme informatique Download PDF

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Publication number
WO2020200396A1
WO2020200396A1 PCT/EP2019/057991 EP2019057991W WO2020200396A1 WO 2020200396 A1 WO2020200396 A1 WO 2020200396A1 EP 2019057991 W EP2019057991 W EP 2019057991W WO 2020200396 A1 WO2020200396 A1 WO 2020200396A1
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WO
WIPO (PCT)
Prior art keywords
doppler shift
network
user equipment
shift information
area
Prior art date
Application number
PCT/EP2019/057991
Other languages
English (en)
Inventor
Jeroen Wigard
István Zsolt KOVÁCS
Daniela Laselva
Original Assignee
Nokia Technologies Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nokia Technologies Oy filed Critical Nokia Technologies Oy
Priority to PCT/EP2019/057991 priority Critical patent/WO2020200396A1/fr
Priority to US17/593,899 priority patent/US12088400B2/en
Publication of WO2020200396A1 publication Critical patent/WO2020200396A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/1851—Systems using a satellite or space-based relay
    • H04B7/18513—Transmission in a satellite or space-based system
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/13—Receivers
    • G01S19/24—Acquisition or tracking or demodulation of signals transmitted by the system
    • G01S19/29—Acquisition or tracking or demodulation of signals transmitted by the system carrier including Doppler, related
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/18502—Airborne stations
    • H04B7/18504—Aircraft used as relay or high altitude atmospheric platform
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/204—Multiple access
    • H04B7/208—Frequency-division multiple access [FDMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0044—Control loops for carrier regulation
    • H04L2027/0063—Elements of loops
    • H04L2027/0065—Frequency error detectors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/0035—Synchronisation arrangements detecting errors in frequency or phase

Definitions

  • wireless communication system at least a part of a communication session, for example, between at least two stations or between at least one station and at least one application server (e.g. for video), occurs over a wireless link.
  • wireless systems comprise public land mobile networks (PLMN) operating based on 3GPP radio standards such as E- UTRA, New Radio, satellite based communication systems and different wireless local networks, for example wireless local area networks (WLAN).
  • PLMN public land mobile networks
  • 3GPP radio standards such as E- UTRA, New Radio, satellite based communication systems
  • different wireless local networks for example wireless local area networks (WLAN).
  • WLAN wireless local area networks
  • the wireless systems can typically be divided into cells, and are therefore often referred to as cellular systems.
  • the apparatus may comprise means for, at the user equipment, determining Doppler shift information associated with the at least one cell for the at least one area and providing the determined Doppler shift information to the network.
  • the apparatus may comprise means for receiving the Doppler shift information from the network using at least one of radio resource control signalling, broadcast signalling, multicast signalling and groupcast signalling.
  • the apparatus may comprise means for providing a request for the Doppler shift information to the network from the user equipment and receiving the Doppler shift information from the network at the user equipment in response to the request.
  • the at least one cell may be associated with a low Earth orbit satellite.
  • the apparatus may comprise means for using the Doppler shift information to compensate for the Doppler shift when performing measurements or an initial access procedure.
  • the Doppler shift information may comprise at least two sets of parameters, each set of parameters associated with a different area.
  • the apparatus may comprise means for: determining which set of parameters to use in communication with the network and providing an indication to the network of the set of parameters used in communication with the network.
  • an apparatus comprising means for determining Doppler shift information associated with at least one cell of a network as a function of time for at least one area and providing the Doppler shift information to a user equipment for use in communicating with the network when the user equipment is in the at least one area.
  • the apparatus may comprise means for determining that the user equipment is in the first area based on at least one of global navigation satellite system information and previous Doppler shift information received from the user equipment.
  • the apparatus may comprise means for receiving Doppler shift information associated with the at least one cell for the at least one area from the user equipment, the Doppler shift information determined at the user equipment.
  • the apparatus may comprise means for providing the Doppler shift information to the user equipment using at least one of radio resource control signalling, broadcast signalling, multicast signalling and groupcast signalling.
  • the broadcast signalling may be broadcast per the at least one area.
  • the apparatus may comprise means for receiving a request for the Doppler shift information from the user equipment and providing the Doppler shift information from the network to the user equipment in response to the request.
  • the at least one cell may be associated with a low Earth orbit satellite.
  • the apparatus may comprise means for providing the Doppler shift information to the user equipment as a function of at least one of user equipment speed and direction.
  • the Doppler shift information may comprise at least one set of parameters associated with a first cell, the parameters defining at least one of frequency offset and time offset of the first cell.
  • the Doppler shift information may comprise at least two sets of parameters, each set of parameters associated with a different area.
  • the apparatus may comprise means for receiving an indication from the user equipment of the set of parameters used in communication with the network.
  • a method comprising receiving from a network, at a user equipment, Doppler shift information associated with at least one cell of the network as a function of time for at least one area and using the Doppler shift information at the user equipment to compensate for the Doppler shift in communication with the network when the user equipment is in the at least one area.
  • the method may comprise, at the user equipment, determining Doppler shift information associated with the at least one cell for the at least one area and providing the determined Doppler shift information to the network.
  • the method may comprise receiving the Doppler shift information from the network using at least one of radio resource control signalling, broadcast signalling, multicast signalling and groupcast signalling.
  • the broadcast signalling may be broadcast per the at least one area.
  • the method may comprise providing a request for the Doppler shift information to the network from the user equipment and receiving the Doppler shift information from the network at the user equipment in response to the request.
  • the at least one cell may be associated with a low Earth orbit satellite.
  • the method may comprise receiving the Doppler shift information from the network as a function of at least one of user equipment speed and direction.
  • the method may comprise using the Doppler shift information to compensate for the Doppler shift when performing measurements or an initial access procedure.
  • the Doppler shift information may comprise at least two sets of parameters, each set of parameters associated with a different area.
  • the method may comprise determining which set of parameters to use in communication with the network and providing an indication to the network of the set of parameters used in communication with the network.
  • the method may comprise determining that the user equipment is in the first area based on at least one of global navigation satellite system information and previous Doppler shift information received from the user equipment.
  • the method may comprise receiving Doppler shift information associated with the at least one cell for the at least one area from the user equipment, the Doppler shift information determined at the user equipment.
  • the method may comprise providing the Doppler shift information to the user equipment using at least one of radio resource control signalling, broadcast signalling, multicast signalling and groupcast signalling.
  • the broadcast signalling may be broadcast per the at least one area.
  • the method may comprise receiving a request for the Doppler shift information from the user equipment and providing the Doppler shift information from the network to the user equipment in response to the request.
  • the at least one cell may be associated with a low Earth orbit satellite.
  • the method may comprise providing the Doppler shift information to the user equipment as a function of at least one of user equipment speed and direction.
  • the Doppler shift information may comprise at least one set of parameters associated with a first cell, the parameters defining at least one of frequency offset and time offset of the first cell.
  • the Doppler shift information may comprise at least two sets of parameters, each set of parameters associated with a different area.
  • the method may comprise receiving an indication from the user equipment of the set of parameters used in communication with the network.
  • an apparatus comprising: at least one processor and at least one memory including a computer program code, the at least one memory and computer program code configured to, with the at least one processor, cause the apparatus at least to: receive from a network, at a user equipment, Doppler shift information associated with at least one cell of the network as a function of time for at least one area and use the Doppler shift information at the user equipment to compensate for the Doppler shift in communication with the network when the user equipment is in the at least one area.
  • the apparatus may be configured to receive the Doppler shift information from the network using at least one of radio resource control signalling, broadcast signalling, multicast signalling and groupcast signalling.
  • the apparatus may be configured to receive Doppler shift information associated with the at least one cell for the at least one area from the user equipment, the Doppler shift information determined at the user equipment.
  • the apparatus may be configured to provide the Doppler shift information to the user equipment using at least one of radio resource control signalling, broadcast signalling, multicast signalling and groupcast signalling.
  • the Doppler shift information may comprise at least one set of parameters associated with a first cell, the parameters defining at least one of frequency offset and time offset of the first cell.
  • the apparatus may be caused to perform, at the user equipment, determining Doppler shift information associated with the at least one cell for the at least one area and providing the determined Doppler shift information to the network.
  • the apparatus may be caused to perform receiving the Doppler shift information from the network using at least one of radio resource control signalling, broadcast signalling, multicast signalling and groupcast signalling.
  • the apparatus may be caused to perform providing a request for the Doppler shift information to the network from the user equipment and receiving the Doppler shift information from the network at the user equipment in response to the request.
  • the at least one cell may be associated with a low Earth orbit satellite.
  • the apparatus may be caused to perform receiving the Doppler shift information from the network as a function of at least one of user equipment speed and direction.
  • the apparatus may be caused to perform using the Doppler shift information to compensate for the Doppler shift when performing measurements or an initial access procedure.
  • the Doppler shift information may comprise at least one set of parameters associated with a first cell, the parameters defining at least one of frequency offset and time offset of the first cell.
  • the Doppler shift information may comprise at least two sets of parameters, each set of parameters associated with a different area.
  • the apparatus may be caused to perform determining which set of parameters to use in communication with the network and providing an indication to the network of the set of parameters used in communication with the network.
  • a computer readable medium comprising program instructions for causing an apparatus to perform at least the following determining Doppler shift information associated with at least one cell of a network as a function of time for at least one area and providing the Doppler shift information to a user equipment for use in communicating with the network when the user equipment is in the at least one area.
  • the apparatus may be caused to perform determining that the user equipment is in the first area based on at least one of global navigation satellite system information and previous Doppler shift information received from the user equipment.
  • the apparatus may be caused to perform receiving Doppler shift information associated with the at least one cell for the at least one area from the user equipment, the Doppler shift information determined at the user equipment.
  • the apparatus may be caused to perform providing the Doppler shift information to the user equipment using at least one of radio resource control signalling, broadcast signalling, multicast signalling and groupcast signalling.
  • the broadcast signalling may be broadcast per the at least one area.
  • the apparatus may be caused to perform receiving a request for the Doppler shift information from the user equipment and providing the Doppler shift information from the network to the user equipment in response to the request.
  • the at least one cell may be associated with a low Earth orbit satellite.
  • the apparatus may be caused to perform providing the Doppler shift information to the user equipment as a function of at least one of user equipment speed and direction.
  • the Doppler shift information may comprise at least one set of parameters associated with a first cell, the parameters defining at least one of frequency offset and time offset of the first cell.
  • the Doppler shift information may comprise at least two sets of parameters, each set of parameters associated with a different area.
  • the apparatus may be caused to perform receiving an indication from the user equipment of the set of parameters used in communication with the network.
  • a ninth aspect there is provided a non-transitory computer readable medium comprising program instructions for causing an apparatus to perform at least the method according to the third or fourth aspect.
  • Figure 3 shows a schematic diagram of an example control apparatus
  • Figure 4 shows a flowchart of a method according to an example embodiment
  • Figure 6 shows a schematic diagram of a user and three satellites according to an example
  • Figure 7 shows a flowchart of a method according to an example embodiment
  • base stations 106 and 107 are shown as connected to a wider communications network 1 13 via gateway 112.
  • a further gateway function may be provided to connect to another network.
  • Base stations of such systems are known as evolved or enhanced Node Bs (eNBs) and provide E-UTRAN features such as user plane Packet Data Convergence/Radio Link Control/Medium Access Control/Physical layer protocol (PDCP/RLC/MAC/PHY) and control plane Radio Resource Control (RRC) protocol terminations towards the communication devices.
  • E-UTRAN features such as user plane Packet Data Convergence/Radio Link Control/Medium Access Control/Physical layer protocol (PDCP/RLC/MAC/PHY) and control plane Radio Resource Control (RRC) protocol terminations towards the communication devices.
  • Other examples of radio access system comprise those provided by base stations of systems that are based on technologies such as wireless local area network (WLAN) and/or WiMax (Worldwide Interoperability for Microwave Access).
  • WLAN wireless local area network
  • WiMax Worldwide Interoperability for Microwave Access
  • a base station can provide coverage for an entire cell or similar radio service area.
  • Core network elements include Mobility Management Entity (MME), Serving Gateway (S-
  • Network architecture in NR may be similar to that of LTE-advanced.
  • Base stations of NR systems may be known as next generation Node Bs (gNBs).
  • Changes to the network architecture may depend on the need to support various radio technologies and finer QoS support, and some on-demand requirements for e.g. QoS levels to support QoE of user point of view.
  • New functions are defined in the 5G system architecture, including an Access Management Function (AMF), Session Management Function (SMF), User Plane Function (UPF), among other network functions in the Next Generation Core (NGC).
  • AMF Access Management Function
  • SMF Session Management Function
  • UPF User Plane Function
  • NGC Next Generation Core
  • the 5G System supports new capabilities, including network slicing which may better tailor networks to application requirements and provide virtual networks for tenants.
  • Future networks may utilise network functions virtualization (NFV) which is a network architecture concept that proposes virtualizing network node functions into“building blocks” or entities that may be operationally connected or linked together to provide services.
  • a virtualized network function (VNF) may comprise one or more virtual machines running computer program codes using standard or general type servers instead of customized hardware. Cloud computing or data storage may also be utilized.
  • radio communications this may mean node operations to be carried out, by a Centralized Unit (CU) at least partly, in a server, host or node operationally coupled to Distributed Unit (DU), which may connect to a remote radio head (RRH). It is also possible that node operations will be distributed among a plurality of servers, nodes or hosts. It should also be understood that the distribution of labour between core network operations and base station operations may differ from that of the LTE or even be non-existent.
  • CU Centralized Unit
  • DU Distributed Unit
  • RRH remote radio head
  • An example 5G core network comprises functional entities.
  • the CN is connected to a UE via the radio access network (RAN).
  • An UPF User Plane Function
  • PSA PDU Session Anchor
  • the UPF may be responsible for forwarding frames back and forth between the DN (data network) and the gNBs through tunnels established over transport networks towards the UE(s) that want to exchange traffic with the DN.
  • a possible mobile communication device will now be described in more detail with reference to Figure 2 showing a schematic, partially sectioned view of a communication device 200.
  • a communication device is often referred to as user equipment (UE) or terminal.
  • An appropriate mobile communication device may be provided by any device capable of sending and receiving radio signals.
  • Non-limiting examples comprise a mobile station (MS) or mobile device such as a mobile phone or what is known as a’smart phone’, a computer provided with a wireless interface card or other wireless interface facility (e.g., USB dongle), personal data assistant (PDA) or a tablet provided with wireless communication capabilities, or any combinations of these or the like.
  • a mobile communication device may provide, for example, communication of data for carrying communications such as voice, electronic mail (email), text message, multimedia and so on.
  • Non-limiting examples of these services comprise two-way or multi-way calls, data communication or multimedia services or simply an access to a data communications network system, such as the Internet. Users may also be provided broadcast or multicast data.
  • Non-limiting examples of the content comprise downloads, television and radio programs, videos, advertisements, various alerts and other information.
  • the Internet of Things (loT) concept extends connectivity from user terminals such as mobile devices to traditionally non-internet-enabled devices comprising, for example, sensors, control system and automated systems.
  • a communication device may be a modem integrated into an industrial actuator (e.g. a robot arm) and/or a modem acting as an Ethernet-hub that will act as a connection point for one or several connected Ethernet devices (which connection may be wired or unwired).
  • a communication device may be a modem integrated on an airplane and served by a terrestrial or non-terrestrial network.
  • a mobile device is typically provided with at least one data processing entity 201 , at least one memory 202 and other possible components 203 for use in software and hardware aided execution of tasks it is designed to perform, including control of access to and communications with access systems and other communication devices.
  • the data processing, storage and other relevant control apparatus can be provided on an appropriate circuit board and/or in chipsets. This feature is denoted by reference 204.
  • the user may control the operation of the mobile device by means of a suitable user interface such as key pad 205, voice commands, touch sensitive screen or pad, combinations thereof or the like.
  • a display 208, a speaker and a microphone can be also provided.
  • a mobile communication device may comprise appropriate connectors (either wired or wireless) to other devices and/or for connecting external accessories, for example hands-free equipment, thereto.
  • the mobile device 200 may receive signals over an air or radio interface 207 via appropriate apparatus for receiving and may transmit signals via appropriate apparatus for transmitting radio signals.
  • transceiver apparatus is designated schematically by block 206.
  • the transceiver apparatus 206 may be provided for example by means of a radio part and associated antenna arrangement.
  • the antenna arrangement may be arranged internally or externally to the mobile device.
  • Figure 3 shows an example embodiment of a control apparatus for a communication system, for example to be coupled to and/or for controlling a station of an access system, such as a RAN node, e.g. a base station, eNB or gNB, a relay node or a core network node such as an MME or S-GW or P-GW, or a core network function such as AMF/SMF, or a server or host.
  • a RAN node e.g. a base station, eNB or gNB
  • a relay node or a core network node such as an MME or S-GW or P-GW
  • a core network function such as AMF/SMF
  • the method may be implanted in a single control apparatus or across more than one control apparatus.
  • the control apparatus may be integrated with or external to a node or module of a core network or RAN.
  • base stations comprise a separate control apparatus unit or module.
  • control apparatus can be another network element such as a radio network controller or a spectrum controller.
  • each base station may have such a control apparatus, such as a CU Control Plane (CU-CP) as well as a control apparatus being provided in a radio network controller.
  • the control apparatus 300 can be arranged to provide control on communications in the service area of the system.
  • the control apparatus 300 comprises at least one memory 301 , at least one data processing unit 302, 303 and an input/output interface 304. Via the interface the control apparatus can be coupled to a receiver and a transmitter of the base station.
  • the receiver and/or the transmitter may be implemented as a radio front end or a remote radio head.
  • a large Doppler frequency shift due to the movement of the satellites (up to 28000 km/h for LEO) and increased latency between RAN and UE due to the distance between base station and UE.
  • Both the Doppler frequency shift and the latency depend on a UE position, and both are time varying due to the fact that the satellites move.
  • the fading and Doppler effects may be significant and lead to acquisition times which are considerably longer than those indicated for an AWGN channel.
  • the typical Doppler shift values in NTN scenario may be found in TR38.81 1 Section 5.3.
  • Doppler shifts up to +/- 45KHz have been identified for the 2GHz frequency band.
  • RSRP, RSRQ handover/cell reselection measurements
  • a UE is a low cost loT device, which requires minimised energy consumption, and may not have GNSS capabilities.
  • GNSS may not be reliable may be jammed, or tampered with.
  • the following is thus also applicable in this case where a UE has a GNSS function.
  • Figure 4 shows a flowchart of a method according to an example embodiment.
  • the method comprises receiving from a network, at a user equipment, Doppler shift information associated with at least one cell of the network as a function of time for at least one area.
  • the UE may use the Doppler shift information received from the network to compensate for the Doppler shift per satellite when the UE performs initial access or measurements.
  • the knowledge of the Doppler shift information may be used by the UE to synchronise to the candidate cells faster, since the UE may skip, or shorten the time for, finding the right frequency and timing. This may speed up neighbouring cell search, neighbouring cell measurements and initial access procedures performed by the UE.
  • the network may determine that the user equipment is in the first area based on at least one of GNSS information or another location method.
  • the UE location may also be estimated through previous estimates of the Doppler shifts. Potentially only the previous Doppler shift value is known, which may then lead to 2 potential locations, symmetric around the satellite orbital plane.
  • the method provides initial Doppler shift information from the network to a UE.
  • a normal synchronization procedure may be used for compensation of the UE speed.
  • speed and direction of the UE are known by the network this may also be applied in the initial Doppler shift determination by the network.
  • the network may provide the Doppler shift information to the user equipment as a function of at least one user equipment speed and direction.
  • the signalling from the network to the UEs may also be based on broadcast, multicast or groupcast.
  • Signalling may be broadcast per area through broadcast information. If the UE knows its position (e.g., through GNSS) the UE can map to the Doppler shift information in the broadcast signalling associated with its area.
  • the UE knows its position (e.g., through GNSS) the UE can map to the Doppler shift information in the broadcast signalling associated with its area.
  • the method may comprise determining, at the user equipment, Doppler shift information associated with the at least one cell for the at least one area and providing the determined Doppler shift information to the network.
  • the method may comprise providing an indication to the network of the set of parameters used in communication with the network. For example, where multiple Doppler shift values are provided for a given area, the UE may provide an indication to the network of which set was most accurate. Alternatively, the UE may provide an indication to the network of the overall Doppler shift the UE is experiencing. The network may use this information to update the location and/or speed plus direction estimation of the UE.
  • Some low cost UE may not be able to compensate for the Doppler offset if the initial Doppler shift is very much away from the real Doppler shift. In that case the UE may try and use the other initial Doppler shift, if provided by the network. If the UE capable of synchronizing anyway, it will take longer, but the UE may provide feedback to the network as described above such the network can provide better information at the next opportunity.
  • the UE determines, or receives from a first cell, at least an indication of the UE’s Doppler Area.
  • the UE determines if the set of Doppler compensation parameters (i.e., Doppler shift information) is available for its Doppler area at the UE. If so, the UE attempts (pre-)synchronisation to at least one of a first cell and a second cell using the stored Doppler compensation parameters valid associated with the current Doppler area. If the (pre-) synchronisation succeeds, the UE sends to the network an index of the successful compensation set. If the compensation set is not available, or the (pre-)synchronisation does not succeed, the UE requests an additional set of Doppler compensation parameters (including its Doppler area if known).
  • the Doppler area may comprise the 3-D geographical area described previously.
  • Figure 9 shows a flowchart of a method according to an example embodiment. The method follows the same steps as that of Figure 8. However, if the second (pre-) synchronisation attempt is not successful, the UE provides a request to the network for an additional set of Doppler compensation parameters and includes the Doppler area, if known.
  • the method may be applicable for NTN networks with LEO satellites, since the satellites can move with relatively high speeds (28000 km/h) which may leading to a large Doppler spread and the cells may have a large coverage area, leading to different time offsets in a cell.
  • the proposed mechanism may allow the network to provide UEs with Doppler shift information without GNSS-based knowledge of their movement and geographical location.
  • An apparatus may comprise means for receiving from a network, at a user equipment, Doppler shift information associated with at least one cell of the network as a function of time for at least one area and using the Doppler shift information at the user equipment to compensate for the Doppler shift in communication with the network when the user equipment is in the at least one area.
  • the various example embodiments may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. Some aspects of the invention may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device, although the invention is not limited thereto. While various aspects of the invention may be illustrated and described as block diagrams, flow charts, or using some other pictorial representation, it is well understood that these blocks, apparatus, systems, techniques or methods described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.
  • the memory may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as semiconductor based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory.
  • the data processors may be of any type suitable to the local technical environment, and may comprise one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs), application specific integrated circuits (ASIC), FPGA, gate level circuits and processors based on multi core processor architecture, as non-limiting examples.
  • Example embodiments of the inventions may be practiced in various components such as integrated circuit modules.
  • the design of integrated circuits is by and large a highly automated process.
  • Complex and powerful software tools are available for converting a logic level design into a semiconductor circuit design ready to be etched and formed on a semiconductor substrate.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
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  • General Physics & Mathematics (AREA)
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Abstract

L'invention concerne un appareil, ledit appareil comprenant des moyens pour recevoir d'un réseau, au niveau d'un équipement utilisateur, des informations de décalage Doppler associées à au moins une cellule du réseau en fonction du temps pour au moins une zone, et utiliser les informations de décalage Doppler au niveau de l'équipement utilisateur pour compenser le décalage Doppler dans une communication avec le réseau quand l'équipement utilisateur se trouve dans ladite au moins une zone.
PCT/EP2019/057991 2019-03-29 2019-03-29 Appareil de compensation de décalage doppler, procédé correspondant et programme informatique WO2020200396A1 (fr)

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PCT/EP2019/057991 WO2020200396A1 (fr) 2019-03-29 2019-03-29 Appareil de compensation de décalage doppler, procédé correspondant et programme informatique
US17/593,899 US12088400B2 (en) 2019-03-29 2019-03-29 Apparatus for doppler shift compensation, corresponding method and computer program

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PCT/EP2019/057991 WO2020200396A1 (fr) 2019-03-29 2019-03-29 Appareil de compensation de décalage doppler, procédé correspondant et programme informatique

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